Direct current

Direct current, Unidirectional flow of electric charge.

Direct current image

Direct current (DC) is the one directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or even through a vacuum as in electron or ion beams. The electric current flows in a constant direction, distinguishing it from alternating current (AC). A term formerly used for this type of current was galvanic current.The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or voltage.Direct current may be converted from an alternating current supply by use of a rectifier, which contains electronic elements (usually) or electromechanical elements (historically) that allow current to flow only in one direction.

High-voltage direct current
3 months ago

High-voltage direct current ... high-voltage, direct current (HVDC) electric power transmission system (also called a power superhighway or an electrical superhighway) uses direct current (DC)...

Transcranial direct-current stimulation
6 hours ago

Transcranial direct-current stimulation ... Transcranial direct current stimulation (tDCS) is a form of neuromodulation that uses constant, low direct current delivered via electrodes on the head...

DC motor
3 months ago

DC motor ... DC motor is any of a class of rotary electrical motors that converts direct current electrical energy into mechanical energy. The most common types rely...

Electric current
3 months ago

Electric current ... the dynamo type. Alternating current can also be converted to direct current through use of a rectifier. Direct current may flow in a conductor such as...

Electric generator
3 months ago

Electric generator ... alternators. Dynamos generate pulsing direct current through the use of a commutator. Alternators generate alternating current. Mechanically a generator consists...

Direct-current plasma
3 months ago

Direct-current plasma ... Direct-current plasma (DCP) is a type of plasma source used for atomic emission spectroscopy that utilizes three electrodes to produce a plasma stream...

DC-to-DC converter
3 months ago

DC-to-DC converter ... electronic circuit or electromechanical device that converts a source of direct current (DC) from one voltage level to another. It is a type of electric power...

Alternating current
3 months ago

Alternating current ... Alternating current (AC) is an electric current which periodically reverses direction and changes its magnitude continuously with time in contrast to direct current...

War of the currents
3 months ago

War of the currents ... street lighting running on high-voltage alternating current (AC), and large-scale low-voltage direct current (DC) indoor incandescent lighting being marketed...

Cardioversion
3 months ago

Cardioversion ... Synchronized electrical cardioversion uses a therapeutic dose of electric current to the heart at a specific moment in the cardiac cycle, restoring the activity...

Neutral direct-current telegraph system
3 months ago
Voltage
3 months ago
Direct Currents
3 months ago
Glow discharge
3 months ago
The Current War
3 months ago
Pulsed DC
3 months ago
Residual-current device
3 months ago
Alternator
3 months ago
Direct
3 months ago
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